Yes, I'm worried about how some people vote.
This is not the first time I've commented on it but I've been noticing answerable, occasionally even interesting questions get a down-vote. No close reason. No comment. It makes me bodily angry because that isn't good enough.
If you down-vote and collectively fail to leave a reason why, you vandalise our community and help nobody.
I'm serious. An anonymous down-vote gets something out the way but there's still a person with a problem. They're either going to repost or, if the problem is that bad, they're going to stop using Ubuntu and swear us off as a bunch of elitist toolbags.
Oh but at least you got the question off the front page! Very well done. If that's your idea of good voting, I'd rather you left us and found a new hobby. Spitting on poor people and bludgeoning stray dogs is about as humane and is twice as useful.
The rest of us want to be the best Ubuntu support channel around and you're ruining it.
I'm not saying you can't vote down but a good critic will also communicate their problem. Not enough detail? Ask for it. Awful formatting? Tell the user to correct it. It takes seconds but goes a mile.
Is it too much effort to write a few words? Go away. You're not welcome here.
To get an idea of the scale of this problem, here's a Data.SE Query that shows open questions with downvotes but 0 comments.. Yeah, some users have taken it upon themselves to vandalise 1400 open questions without giving the slightest hint why.
In a case-by-case basis, Jorge is completely right. If you see something being needlessly abused, post if up here on meta and we'll try to fix it. That usually means people getting a wildly inflated score for a mediocre question but I'd rather than than let them linger at -1.
On a similar note, in September (though there were earlier experiments), I looked into our biggest down-voters. Most people think that voting is completely anonymous but how you vote is public data, it's just not linked to the posts.
Before I post it, I want to be clear that I don't neccessarily consider these users to be the same people I was addressing above. They're just people who have voted down, a lot. Most of that comes from hogging the review queue (which they do). Here's the query.
To all reading this: Look at your statistics on your own profile pages. If you have fewer comments than negative votes, you're probably doing something wrong. If that's because you're exasperated with the poor quality of new questions, spend some time frolicking in amongst the newly answered questions.
If you're thundering down thousands of negative votes with only a handful of positives perhaps it's time to see if you can chill out and find a better line to approach the site on.